A Portable Dark Room for Processing X-ray Films Rapidly

Radiology ◽  
1941 ◽  
Vol 37 (6) ◽  
pp. 740-742
Author(s):  
Clifford Jones
Keyword(s):  
X Ray ◽  
Dark Room

LUMINOGRAPHIC VISUALIZATION OF VON WILLEBRAND FACTOR MULTIMERS

1987 ◽  
Author(s):  
R Schneppenheim ◽  
H Plendl ◽  
U Budde
Keyword(s):  
Shelf Life ◽  
Von Willebrand Factor ◽  
Tris Buffer ◽  
Rabbit Antibody ◽  
X Ray ◽  
Color Development ◽  
Normal Plasma ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Dark Room

Current methods for visualization of vWF multimers use either autoradiography or enzymatic color development. Radioactive methods bear some risks for laboratory personal and the radioactive antibodies have a relatively short shelf life. Enzyme labelled antibodies used with their usual substrates are less sensitive even with relatively large amounts of antibody.These drawbacks can be overcome by using peroxidase labelled antibodies and luminol for visualization of vWF multimers. Electrophoresis in LGT agarose and immunoblot on nitrocellulose were performed as described in the literature. The nitrocellulose sheets were immersed in polyclonal anti-vWF antibody (1:500) followed by a peroxidase labelled anti-rabbit antibody (1:500). The subsequent procedures were performed in a dark room. The gels were overlaid by 40 mg luminol suspended in 100 ml TRIS buffer (pH 7.5) and covered with a thin transparent foil. The luminiscence could be detected visually for about 40 minutes. There was enough time to expose up to 10 x-ray films by simply placing the films for some seconds onto the transparent foil.The method is sensitive enough to allow 1:200 dilutions of normal plasma. Thus plasmas containing substantially less than 10% vWF protein can be evaluated with this method.

Automatic Temperature Regulation for the X-Ray Dark Room Solutions

Radiology ◽  
1934 ◽  
Vol 22 (5) ◽  
pp. 539-547 ◽  
Author(s):  
W. Edward Chamberlain ◽  
George C. Henny
Keyword(s):  
Temperature Regulation ◽  
Automatic Temperature ◽  
X Ray ◽  
Dark Room

Preparation of a Novel Red Long Lasting Phosphorescent Material CaAl2Si2O8:Mn2+ and Investigation of its Luminescent Properties

2011 ◽  
Vol 71-78 ◽  
pp. 3151-3155 ◽  
Author(s):  
Bi Sang Chen ◽  
Zi Shan Zheng ◽  
Yan Mei Lin ◽  
Guo Liang Chen ◽  
Liang Zhou ◽  
...  
Keyword(s):  
Uv Light ◽  
Sol Gel ◽  
Luminescent Properties ◽  
Light Irradiation ◽  
Gel Method ◽  
X Ray ◽  
Uv Light Irradiation ◽  
Phosphorescent Material ◽  
Fluorescence Spectrometer ◽  
Dark Room

A novel red long-lasting phosphor CaAl2Si2O8:Mn2+ was successfully synthesized by sol-gel method. X-ray diffractometer(XRD) and fluorescence spectrometer were used to characterize the structure and photoluminescence of the persistent phosphors, respectively. Under UV light irradiation, this phosphor showed obvious long-lasting phosphorescence that can be clearly seen with naked eyes in a dark room for 18 min after the irradiation source has been removed. Thermoluminescence measurement showed that the phosphor has an appropriate energy depth of 0.43 ev.

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

Some Problems in Understanding the Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 1-9
Author(s):  
A. H. Gabriel
Keyword(s):  
Solar Corona ◽  
Solar Atmosphere ◽  
Theoretical Modelling ◽  
Total System ◽  
Major Advance ◽  
X Ray ◽  
Proper Perspective ◽  
Space Observations

The development of the physics of the solar atmosphere during the last 50 years has been greatly influenced by the increasing capability of observations made from space. Access to images and spectra of the hotter plasma in the UV, XUV and X-ray regions provided a major advance over the few coronal forbidden lines seen in the visible and enabled the cooler chromospheric and photospheric plasma to be seen in its proper perspective, as part of a total system. In this way space observations have stimulated new and important advances, not only in space but also in ground-based observations and theoretical modelling, so that today we find a well-balanced harmony between the three techniques.

White-Light Coronal Structures: Streamers and CMEs

1994 ◽  
Vol 144 ◽  
pp. 82
Author(s):  
E. Hildner
Keyword(s):  
Emission Line ◽  
Electron Density ◽  
White Light ◽  
Coronal Mass Ejections ◽  
X Rays ◽  
Solar Cycles ◽  
Temperature Function ◽  
X Ray ◽  
Eclipse Observations ◽  
Coronal Structures

AbstractOver the last twenty years, orbiting coronagraphs have vastly increased the amount of observational material for the whitelight corona. Spanning almost two solar cycles, and augmented by ground-based K-coronameter, emission-line, and eclipse observations, these data allow us to assess,inter alia: the typical and atypical behavior of the corona; how the corona evolves on time scales from minutes to a decade; and (in some respects) the relation between photospheric, coronal, and interplanetary features. This talk will review recent results on these three topics. A remark or two will attempt to relate the whitelight corona between 1.5 and 6 R⊙to the corona seen at lower altitudes in soft X-rays (e.g., with Yohkoh). The whitelight emission depends only on integrated electron density independent of temperature, whereas the soft X-ray emission depends upon the integral of electron density squared times a temperature function. The properties of coronal mass ejections (CMEs) will be reviewed briefly and their relationships to other solar and interplanetary phenomena will be noted.

Iron K-Line Emission from X-Ray Binaries

1988 ◽  
Vol 102 ◽  
pp. 47-50
Author(s):  
K. Masai ◽  
S. Hayakawa ◽  
F. Nagase
Keyword(s):  
Accretion Disk ◽  
Radiative Recombination ◽  
Characteristic Temperature ◽  
Line Emission ◽  
Ionization Front ◽  
Continuum Radiation ◽  
X Ray ◽  
Low Mass ◽  
X Ray Binaries

AbstractEmission mechanisms of the iron Kα-lines in X-ray binaries are discussed in relation with the characteristic temperature Txof continuum radiation thereof. The 6.7 keV line is ascribed to radiative recombination followed by cascades in a corona of ∼ 100 eV formed above the accretion disk. This mechanism is attained for Tx≲ 10 keV as observed for low mass X-ray binaries. The 6.4 keV line observed for binary X-ray pulsars with Tx> 10 keV is likely due to fluorescence outside the He II ionization front.

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

Axial Observation of X-Ray Spectra from a Beam-Foil Source

1988 ◽  
Vol 102 ◽  
pp. 339-342
Author(s):  
J.M. Laming ◽  
J.D. Silver ◽  
R. Barnsley ◽  
J. Dunn ◽  
K.D. Evans ◽  
...  
Keyword(s):  
Spectral Resolution ◽  
Heavy Ion ◽  
Ion Beams ◽  
Beam Axis ◽  
Doppler Broadening ◽  
X Ray ◽  
Beam Foil

AbstractNew observations of x-ray spectra from foil-excited heavy ion beams are reported. By observing the target in a direction along the beam axis, an improvement in spectral resolution, δλ/λ, by about a factor of two is achieved, due to the reduced Doppler broadening in this geometry.

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